*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --sidebar-width: 170px;
}

body {
  background: #000;
  color: #fff;
  font-family: 'Lato', helvetica, arial, sans-serif;
  font-weight: 300;
  min-height: 100vh;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100%;
  padding: 2rem 1rem 2rem 1.5rem;
  z-index: 10;
  background: rgba(0, 0, 0, 0.7);
}

header h1 {
  font-size: 0.875rem;
  font-weight: 300;
  letter-spacing: 0.06em;
  line-height: 1.5;
}

main {
  margin-left: var(--sidebar-width);
}

figure {
  display: block;
}

figure img {
  width: 100%;
  height: auto;
  display: block;
}

.empty {
  padding: 4rem 2rem;
  opacity: 0.4;
  font-size: 0.875rem;
}

@media (max-width: 640px) {
  header {
    position: static;
    width: 100%;
    height: auto;
    padding: 1.25rem 1rem;
  }

  main {
    margin-left: 0;
  }
}